JPS609589Y2 - gas stove - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas stove configured to ignite a main burner with a pilot burner. In particular, a side wall is provided around the pilot burner ignition part to suppress the spread of the flame. It is.

Conventionally, in an ignition device without a guide, the pilot flame ejects from the pilot burner and then spreads out with the air, and in a diffusion combustion stove, the flame of the pilot burner 6 flows into the premixing section of the outer combustion tube. In the case of a collision, it spreads in the circumferential direction along the outer combustion tube after the collision.

As a result, the area in which the pilot burner flame comes into contact with the combustion part of the outer combustion tube becomes wider, which prevents the flame from diffusing with the secondary air of the main burner, causing the main gas to blow away and increasing the spread of the fire during pilot ignition. There were drawbacks.

Also, if the flow rate of the pilot burner is reduced,
Since the pilot flame spreads in the circumferential direction, it cannot reach the combustion section of the outer combustion tube, making it impossible to supply ignition flame to the main gas, resulting in poor ignition performance.

The present invention improves the problems of the prior art described above.

The details of the present invention will be explained below with reference to the drawings.

1 to 3 show an embodiment of the present invention, and in the figures, 1 is the main burner fuel injection part, 2 is the external combustion tube premixing part, 3 is the external combustion cylinder combustion part, and 4 is the internal combustion cylinder. lens barrel premixing section,
5 is an internal combustion barrel combustion section, 6 is a pilot burner for ignition, and 7 is an ignition pilot burner.
8 is a cock, 8 is a glass cylinder, 9 is a drafter, 10 is a glass receiver stand, 11 is a piezoelectric spark plug, and 12 is a guide.

First, the configuration and combustion method of a diffusion combustion type gas stove will be described with reference to Figure 1.

After the cock 7 is opened, fuel gas is simultaneously ejected from the main burner 1 and the ignition pilot burner 6.

The gas ejected from the main burner 1 is transferred to the combustion section 3 of the inner and outer combustion tubes.
.

On the other hand, the flame of the pilot burner 6 for ignition heats the external combustion tube premixing section 2 and partially supplies unburned and burnt gas from the hole in the external combustion tube mixing section 2 between the inner and outer combustion tubes. It ascends along the combustion barrel 2 and reaches the combustion section 3, where it ignites the gas in the main burner.

After ignition, a part of the premixed gas reacts with the secondary air flowing in from the holes in the combustion part 5 of the inner combustion cylinder, forming a flame between the inner and outer combustion cylinders, and a part of the premixed gas forms a flame between the combustion parts 3 of the outer combustion cylinder. The external combustion cylinder 2 and the glass receiver react with the secondary air flowing in from the gap with the stand 10 due to the draft effect of the external combustion cylinder, the glass cylinder 8, and the drafter 9. Cylindrical combustion section 3
Forms a flame on the outside.

Next, the operation of the present invention will be explained in detail.

In Fig. 3, at startup, the pilot burner flame collides with the outer combustion tube premixing section 2, but since the gap between the guide side wall end face and the outer combustion tube premixing section is less than the extinguishing distance, the pilot burner flame collides with the outer combustion tube premixing section 2. It does not spread toward the direction, but rises along the guide and the outer combustion tube premixing section 2, passes through the gap between the upper surfaces of the guide, reaches the combustion section 3, and ignites the main gas.

At this time, since the width of the pilot burner flame is limited and narrow, there is an advantage that the flame can reach the combustion section 3 even when the pilot burner flow rate is small.

Furthermore, since the width of the pilot flame flowing in contact with the combustion section 3 is narrow, the range of interference with the main gas is narrowed, and the flame elongation during pilot ignition is reduced.

It should be noted that if the guide 12 is closed by providing a top plate, the spread of the pilot burner will be smaller, but the ignition performance of the pilot burner will deteriorate unless the gap between the outer combustion tube and the end face of the top plate is less than the extinguishing distance. .

The present invention as described above provides excellent ignition performance even when the pilot flow rate is low and reduces the flame extension during pilot ignition by providing a guide that limits the spread of the pilot flame.

Furthermore, the guide can be provided separately from the outer combustion tube, allowing for a wide range of assembly accuracy and ease of assembly.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a gas stove according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 shows the configuration of the ignition pilot burner, combustion tube, and guide. It is a partially cutaway perspective view. DESCRIPTION OF SYMBOLS 1... Fuel injection part, 2... Outer combustion tube premixing part, 3... Outer combustion tube combustion part, 4... Curved/inner combustion tube premixing part, 5... ...Inner combustion cylinder combustion section, 6. Pilot burner for bending and ignition, 7..Cook, tail...
...Glass tube, 9...Drafter, 10...
...Glass holder is stand, 11...Piezoelectric spark plug,
12...Guide.

Claims (2)

[Scope of utility model registration request] (1) In a gas stove that ejects and burns gas between an internal combustion tube and an external combustion tube, a pilot burner ejection part is disposed outside the external combustion tube, and a pilot burner introduction hole is formed in the external combustion tube. A gas stove in which the pilot burner ejection part is surrounded by the external combustion barrel and the guide. (2) The gas stove according to claim 1, wherein the gap between the guide end face and the external combustion barrel is equal to or less than the flame extinction distance.